What speed should a spaceship of mass 5.21 x 107 kg moving around a planet only by the gravitational force be, if the
distance between them is 6.27 x 108 m and the mass of the
planet is 4.76 x 1026 kg? Estimate G as 6.67 x 10-9 N (m/kg)
2

28. a stone is projected at a cliff of height h with an initial speed of 42.0 mls directed at angle θ0 = 60.0° above the horizontal. the stone strikes at a, 5.50 s after launching. find (a) the height h of the cliff, (b) the speed of the stone just before impact at a, and (c) the maximum height h reached above the grou

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

What do we mean by the event horizon of a black hole?